CVE-2026-7301 CVE-2026-7301
Remote attackers can execute arbitrary code via pickle deserialization in the SGLang multimodal generation runtime scheduler's default network configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7301?
CVE-2026-7301 is a critical unsafe deserialization vulnerability in SGLang, published on 18 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SGLangs multimodal generation runtime scheduler's ROUTER socket binds to 0.0.0.0 by default and contains a sink that calls pickle.loads() on incoming messages, enabling RCE when exposed to the internet.
Weakness: CWE-502
Which versions are affected by CVE-2026-7301?
3 open source packages ship an affected version, including sglang. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sglang PyPI | From 0.5.5 to 0.5.12 | None |
sglang PyPI | From 0.5.5 to 0.5.12 | None |
sglang PyPI | From 0.5.5 to 0.5.12 | None |
Products include Lmsys Sglang.
How do I fix CVE-2026-7301?
No fix has been published for CVE-2026-7301 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-7301 being exploited?
There is no known exploitation of CVE-2026-7301 in the wild and no public exploit code.
Other vulnerabilities in SGLang
Sources
Also known as GHSA-gwv6-pq6m-p3rq, PYSEC-2026-536.